CoreStorage revert Error: A disk with a mount point is required

[Mehnock]

Hello,

I tried to mount a Mac OS SSD into my Macbook Pro to recover some files and at first, my Mac saw the drive and everything was fine, then I unmounted and have not been able to get back in it.

As it turns out, my Macbook converted the drive to a CoreStorage drive but when I try to revert it gives me
Error: -69854: A disk with a mount point is required.

Here is what it looks like now:

OSX-Work:~ chris$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 295D7810-5A9A-4980-A694-C7FA89CB03F7
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         120473067520 B (120.5 GB)
    Free Space:   12656640 B (12.7 MB)
    |
    +-< Physical Volume 6F497025-976E-41F8-8534-BCDE4F0D5DE1
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk3s2
    |   Status:   Online
    |   Size:     120473067520 B (120.5 GB)
    |
    +-> Logical Volume Family 84F362BA-84DE-40C5-AE48-070BE71F096D
        ----------------------------------------------------------
        Encryption Type:         None
        |
        +-> Logical Volume 673E813F-8DC7-4418-80A0-E1C3D899641D
            ---------------------------------------------------
            Disk:                  disk4
            Status:                Online
            Size (Total):          120108089344 B (120.1 GB)
            Revertible:            Yes (no decryption required)
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS

OSX-Work:~ chris$ sudo diskutil cs revert 673E813F-8DC7-4418-80A0-E1C3D899641D
Password:
Started CoreStorage operation on disk4 Macintosh HD
Error: -69854: A disk with a mount point is required

I don't have to revert it but I thought that would let me access it.

Bottom line, I need to access the data on the drive to copy it to another machine.

 

[Weaselboy]

You are pointing at the wrong volume. Try it with the 295D7... one.

 

[Mehnock]

You are pointing at the wrong volume. Try it with the 295D7... one.

Thanks for the suggestion, but I have tried reverting all UUIDs in there, nothing works. The command though, does expect a volume UUID so it would only work with the last one.

I tried running the following to mount the drive and it just gives me this generic error:

OSX-Work:~ chris$ diskutil mount disk4
disk4 is a CoreStorage Logical Volume which failed to mount

[doublepost=1511211243][/doublepost]Here is another good one: I tried to mount using mountDisk and it says it mounted successfully, but it's nowhere to be found!

OSX-Work:~ chris$ diskutil mountDisk disk4
Volume(s) mounted successfully

OSX-Work:~ chris$ mount
/dev/disk0s2 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
/dev/disk2s2 on /Volumes/Data (hfs, local, journaled)
/dev/disk1s2 on /Volumes/Media (hfs, local, journaled)

 

[Mehnock]

You are pointing at the wrong volume. Try it with the 295D7... one.

Any other thoughts on how to fix this?

 

[Weaselboy]

Any other thoughts on how to fix this?

Based on your earlier description of how this started, I'm thinking you may have a bad drive.

 

[fmthoangan]

Based on your earlier description of how this started, I'm thinking you may have a bad drive.

I got the EXACT situation like yours. I am lost. Nobody can help us. I thought maybe our Sata internal Hard disk was CRASHED. I came up with ordering a new one